feat: add map_launch package

launch/map_launch/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.5)
+project(map_launch)
+
+if(NOT CMAKE_CXX_STANDARD)
+  set(CMAKE_CXX_STANDARD 14)
+endif()
+if(CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID MATCHES "Clang")
+  add_compile_options(-Wno-unused-parameter -Wall -Wextra -Wpedantic)
+endif()
+
+find_package(ament_cmake_auto REQUIRED)
+ament_auto_find_build_dependencies()
+
+if(BUILD_TESTING)
+  find_package(ament_lint_auto REQUIRED)
+  ament_lint_auto_find_test_dependencies()
+endif()
+
+ament_auto_package(
+  INSTALL_TO_SHARE
+  launch
+)

launch/map_launch/README.md

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+# map_launch
+
+## Structure
+
+![map_launch](./map_launch.drawio.svg)
+
+## Package Dependencies
+
+Please see `<exec_depend>` in `package.xml`.
+
+## Usage
+
+You can include as follows in `*.launch.xml` to use `map.launch.py`.
+
+```xml
+<arg name="map_path" description="point cloud and lanelet2 map directory path"/>
+<arg name="lanelet2_map_file" default="lanelet2_map.osm" description="lanelet2 map file name"/>
+<arg name="pointcloud_map_file" default="pointcloud_map.pcd" description="pointcloud map file name"/>
+
+<include file="$(find-pkg-share map_launch)/launch/map.launch.py">
+  <arg name="lanelet2_map_path" value="$(var map_path)/$(var lanelet2_map_file)" />
+  <arg name="pointcloud_map_path" value="$(var map_path)/$(var pointcloud_map_file)"/>
+</include>
+```
+
+## Notes
+
+For reducing processing load, we use the [Component](https://docs.ros.org/en/galactic/Concepts/About-Composition.html) feature in ROS2 (similar to Nodelet in ROS1 )

launch/map_launch/launch/map.launch.py

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+# Copyright 2021 Tier IV, Inc. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import launch
+from launch.actions import DeclareLaunchArgument
+from launch.actions import GroupAction
+from launch.actions import SetLaunchConfiguration
+from launch.conditions import IfCondition
+from launch.conditions import UnlessCondition
+from launch.substitutions import LaunchConfiguration
+from launch_ros.actions import ComposableNodeContainer
+from launch_ros.actions import Node
+from launch_ros.actions import PushRosNamespace
+from launch_ros.descriptions import ComposableNode
+
+
+def generate_launch_description():
+    map_hash_generator = Node(
+        package="map_loader",
+        executable="map_hash_generator",
+        name="map_hash_generator",
+        parameters=[
+            {
+                "lanelet2_map_path": LaunchConfiguration("lanelet2_map_path"),
+                "pointcloud_map_path": LaunchConfiguration("pointcloud_map_path"),
+            }
+        ],
+    )
+
+    lanelet2_map_loader = ComposableNode(
+        package="map_loader",
+        plugin="Lanelet2MapLoaderNode",
+        name="lanelet2_map_loader",
+        remappings=[("output/lanelet2_map", "vector_map")],
+        parameters=[
+            {
+                "center_line_resolution": 5.0,
+                "lanelet2_map_path": LaunchConfiguration("lanelet2_map_path"),
+            }
+        ],
+        extra_arguments=[{"use_intra_process_comms": LaunchConfiguration("use_intra_process")}],
+    )
+
+    lanelet2_map_visualization = ComposableNode(
+        package="map_loader",
+        plugin="Lanelet2MapVisualizationNode",
+        name="lanelet2_map_visualization",
+        remappings=[
+            ("input/lanelet2_map", "vector_map"),
+            ("output/lanelet2_map_marker", "vector_map_marker"),
+        ],
+        extra_arguments=[{"use_intra_process_comms": LaunchConfiguration("use_intra_process")}],
+    )
+
+    pointcloud_map_loader = ComposableNode(
+        package="map_loader",
+        plugin="PointCloudMapLoaderNode",
+        name="pointcloud_map_loader",
+        remappings=[("output/pointcloud_map", "pointcloud_map")],
+        parameters=[
+            {"pcd_paths_or_directory": ["[", LaunchConfiguration("pointcloud_map_path"), "]"]}
+        ],
+        extra_arguments=[{"use_intra_process_comms": LaunchConfiguration("use_intra_process")}],
+    )
+
+    map_tf_generator = ComposableNode(
+        package="map_tf_generator",
+        plugin="MapTFGeneratorNode",
+        name="map_tf_generator",
+        parameters=[
+            {
+                "map_frame": "map",
+                "viewer_frame": "viewer",
+            }
+        ],
+        extra_arguments=[{"use_intra_process_comms": LaunchConfiguration("use_intra_process")}],
+    )
+
+    container = ComposableNodeContainer(
+        name="map_container",
+        namespace="",
+        package="rclcpp_components",
+        executable=LaunchConfiguration("container_executable"),
+        composable_node_descriptions=[
+            lanelet2_map_loader,
+            lanelet2_map_visualization,
+            pointcloud_map_loader,
+            map_tf_generator,
+        ],
+        output="screen",
+    )
+
+    def add_launch_arg(name: str, default_value=None, description=None):
+        return DeclareLaunchArgument(name, default_value=default_value, description=description)
+
+    return launch.LaunchDescription(
+        [
+            add_launch_arg("map_path", "", "path to map directory"),
+            add_launch_arg(
+                "lanelet2_map_path",
+                [LaunchConfiguration("map_path"), "/lanelet2_map.osm"],
+                "path to lanelet2 map file",
+            ),
+            add_launch_arg(
+                "pointcloud_map_path",
+                [LaunchConfiguration("map_path"), "/pointcloud_map.pcd"],
+                "path to pointcloud map file",
+            ),
+            add_launch_arg(
+                "use_intra_process", "false", "use ROS2 component container communication"
+            ),
+            add_launch_arg("use_multithread", "false", "use multithread"),
+            SetLaunchConfiguration(
+                "container_executable",
+                "component_container",
+                condition=UnlessCondition(LaunchConfiguration("use_multithread")),
+            ),
+            SetLaunchConfiguration(
+                "container_executable",
+                "component_container_mt",
+                condition=IfCondition(LaunchConfiguration("use_multithread")),
+            ),
+            GroupAction(
+                [
+                    PushRosNamespace("map"),
+                    container,
+                    map_hash_generator,
+                ]
+            ),
+        ]
+    )

launch/map_launch/launch/map.launch.xml

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+<launch>
+  <arg name="map_path" default="" />
+  <arg name="lanelet2_map_path" default="$(var map_path)/lanelet2_map.osm" />
+  <arg name="pointcloud_map_path" default="$(var map_path)/pointcloud_map.pcd" />
+
+  <group>
+    <push-ros-namespace namespace="map"/>
+    <include file="$(find-pkg-share map_loader)/launch/lanelet2_map_loader.launch.xml">
+      <arg name="lanelet2_map_path" value="$(var lanelet2_map_path)" />
+    </include>
+
+    <node pkg="map_loader" exec="pointcloud_map_loader" name="pointcloud_map_loader">
+      <remap from="output/pointcloud_map" to="/map/pointcloud_map" />
+      <param name="pcd_paths_or_directory" value="[$(var pointcloud_map_path)]" />
+    </node>
+
+    <include file="$(find-pkg-share map_tf_generator)/launch/map_tf_generator.launch.xml">
+      <arg name="input_map_points_topic" value="/map/pointcloud_map" />
+    </include>
+  </group>
+
+</launch>